Math Scalar Library
Programming Reference Manual C/C++
Version 1.1 DD-00003-011

7.8 sacospi - Half-Cycle Arccosine cos-1(x)/π

#include <msca.h> 
 
double sacospi (double x); 
float  sacospif(float x);

Given a value x this function computes the half-cycle arccosine cos-1(x)/π .